I can't tell if my boyfriend's best friend likes me..what do you think?

Alright so I have a bit of a complicated situation. It may seem silly, but can someone please tell me what this situation seems like from the outside? Do you think my bf's best friend might like me a little? Please bear with me as this may get confusing.

I've been dating my boyfriend for a while now, and we're madly in love. But years and years ago I had a huge crush on his best friend. I've gotten over him since, but now I'm getting vibes from him that seem reciprocal. He's a nice guy, and extremely handsome. He was having some major gf problems, (mind you they are no longer on speaking terms.) We talk and laugh about things all the time. We hug and all but in my mind it's all friendly!

I recently found out that before my guy and I were dating, his best friend had been scoping me out for a while to pair us up. This makes me think that he doesn't like me because he wanted me for someone else. But now that I'm taken I don't see why his eyes are still glued to me, from the instant I walk into a room to the moment I leave. This makes me think that he could like me and maybe he found some quality in me that he actually likes for himself. I don't know.

Sometimes, he acts like my boyfriend and I shoudn't be together at all. Everything is beautiful between us but Mr. Bestfriend makes it seem like we have critical matters to be solved! I don't mean to sound cocky like every guy I meat just falls in love with me lol. It just seems like I'm getting those vibes from him and I'm usually clueless as to when peole are interested. Could he be jealous and have a possible crush or is he just bipolar?

Oh and by the way, sex isn't a factor in our relationship. We abstain for religious reasons so I'm really in this because I want to be, not just for the rights to have sex with my boyfriend exclusively.

Thank you all for your answers. In response to Soon567, I agree with what you're saying about entertaining the thoughts of another. But I'm not. I really do love my boyfriend and I would never leave him for anyone. I just want to be aware of what's going on around me. I want to know what people's intentions are. Sorry I didn't mean to sound disloyal.

The handsome guy does not want a relationship (especially after major gf problems), he hooked you guys up so he could avoid that. But he still enjoys the thrill, the secretive liking between you two. He is not jealous. You are probably very attractive and guys like to stare at girls, like they enter a moment, it's healthy for them to look at something beautiful.

He is attracted to you but he is not ready for a relationship, he cannot switch off his feelings for you. But do not expect anything from him. Staring his okay, flirting isn't. If he keeps on pretending to be your boyfriend tell him stop because you guys might be playing with fire, and that would hurt your relationship with you boyfriend now. He wanted drama, don't be trapped in it.